Voice coil motor

Details Voice coil motor Voice coil motor

1993-12-01

1995-06-13

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Linear

H02K 4102

Patent

active

054245915

ABSTRACT:
A voice coil motor including (a) an E-shaped yoke having a center yoke portion and side yoke portions and constituted by a plurality of thin plates having the same configuration and stacked together; (b) a counter yoke member secured to an open end of the yoke; (c) permanent magnets secured to inner sides of the side yoke portions such that the same magnetic poles are opposed; (d) a hollow, cylindrical, movable coil supported for movements along the center yoke portion; and (e) a covering made of a corrosion-resistant material and provided integrally on outer surfaces of the yoke and the permanent magnets.

REFERENCES:
patent: 3984706 (1976-10-01), Inouye
patent: 4805055 (1989-02-01), Wright
patent: 4888506 (1989-12-01), Umehara et al.
patent: 5051669 (1991-09-01), Hsiao et al.
patent: 5113099 (1992-05-01), Wong et al.
patent: 5243248 (1993-09-01), Benford et al.

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